1 /* Command line option handling.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed by Neil Booth.
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING3. If not see
20 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
31 #include "langhooks.h"
37 #include "diagnostic.h"
38 #include "tm_p.h" /* For OPTIMIZATION_OPTIONS. */
39 #include "insn-attr.h" /* For INSN_SCHEDULING. */
41 #include "tree-pass.h"
45 /* Value of the -G xx switch, and whether it was passed or not. */
46 unsigned HOST_WIDE_INT g_switch_value;
49 /* True if we should exit after parsing options. */
50 bool exit_after_options;
52 /* Print various extra warnings. -W/-Wextra. */
55 /* True to warn about any objects definitions whose size is larger
56 than N bytes. Also want about function definitions whose returned
57 values are larger than N bytes, where N is `larger_than_size'. */
58 bool warn_larger_than;
59 HOST_WIDE_INT larger_than_size;
61 /* True to warn about any function whose frame size is larger
63 bool warn_frame_larger_than;
64 HOST_WIDE_INT frame_larger_than_size;
66 /* Hack for cooperation between set_Wunused and set_Wextra. */
67 static bool maybe_warn_unused_parameter;
69 /* Type(s) of debugging information we are producing (if any). See
70 flags.h for the definitions of the different possible types of
71 debugging information. */
72 enum debug_info_type write_symbols = NO_DEBUG;
74 /* Level of debugging information we are producing. See flags.h for
75 the definitions of the different possible levels. */
76 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
78 /* A major contribution to object and executable size is debug
79 information size. A major contribution to debug information size
80 is struct descriptions replicated in several object files. The
81 following flags attempt to reduce this information. The basic
82 idea is to not emit struct debugging information in the current
83 compilation unit when that information will be generated by
84 another compilation unit.
86 Debug information for a struct defined in the current source
87 file should be generated in the object file. Likewise the
88 debug information for a struct defined in a header should be
89 generated in the object file of the corresponding source file.
90 Both of these case are handled when the base name of the file of
91 the struct definition matches the base name of the source file
92 of the current compilation unit. This matching emits minimal
93 struct debugging information.
95 The base file name matching rule above will fail to emit debug
96 information for structs defined in system headers. So a second
97 category of files includes system headers in addition to files
100 The remaining types of files are library headers and application
101 headers. We cannot currently distinguish these two types. */
103 enum debug_struct_file
105 DINFO_STRUCT_FILE_NONE, /* Debug no structs. */
106 DINFO_STRUCT_FILE_BASE, /* Debug structs defined in files with the
107 same base name as the compilation unit. */
108 DINFO_STRUCT_FILE_SYS, /* Also debug structs defined in system
110 DINFO_STRUCT_FILE_ANY /* Debug structs defined in all files. */
113 /* Generic structs (e.g. templates not explicitly specialized)
114 may not have a compilation unit associated with them, and so
115 may need to be treated differently from ordinary structs.
117 Structs only handled by reference (indirectly), will also usually
118 not need as much debugging information. */
120 static enum debug_struct_file debug_struct_ordinary[DINFO_USAGE_NUM_ENUMS]
121 = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
122 static enum debug_struct_file debug_struct_generic[DINFO_USAGE_NUM_ENUMS]
123 = { DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY, DINFO_STRUCT_FILE_ANY };
125 /* Parse the -femit-struct-debug-detailed option value
126 and set the flag variables. */
128 #define MATCH( prefix, string ) \
129 ((strncmp (prefix, string, sizeof prefix - 1) == 0) \
130 ? ((string += sizeof prefix - 1), 1) : 0)
133 set_struct_debug_option (const char *spec)
135 /* various labels for comparison */
136 static char dfn_lbl[] = "dfn:", dir_lbl[] = "dir:", ind_lbl[] = "ind:";
137 static char ord_lbl[] = "ord:", gen_lbl[] = "gen:";
138 static char none_lbl[] = "none", any_lbl[] = "any";
139 static char base_lbl[] = "base", sys_lbl[] = "sys";
141 enum debug_struct_file files = DINFO_STRUCT_FILE_ANY;
142 /* Default is to apply to as much as possible. */
143 enum debug_info_usage usage = DINFO_USAGE_NUM_ENUMS;
144 int ord = 1, gen = 1;
147 if (MATCH (dfn_lbl, spec))
148 usage = DINFO_USAGE_DFN;
149 else if (MATCH (dir_lbl, spec))
150 usage = DINFO_USAGE_DIR_USE;
151 else if (MATCH (ind_lbl, spec))
152 usage = DINFO_USAGE_IND_USE;
154 /* Generics or not? */
155 if (MATCH (ord_lbl, spec))
157 else if (MATCH (gen_lbl, spec))
160 /* What allowable environment? */
161 if (MATCH (none_lbl, spec))
162 files = DINFO_STRUCT_FILE_NONE;
163 else if (MATCH (any_lbl, spec))
164 files = DINFO_STRUCT_FILE_ANY;
165 else if (MATCH (sys_lbl, spec))
166 files = DINFO_STRUCT_FILE_SYS;
167 else if (MATCH (base_lbl, spec))
168 files = DINFO_STRUCT_FILE_BASE;
170 error ("argument %qs to %<-femit-struct-debug-detailed%> not recognized",
173 /* Effect the specification. */
174 if (usage == DINFO_USAGE_NUM_ENUMS)
178 debug_struct_ordinary[DINFO_USAGE_DFN] = files;
179 debug_struct_ordinary[DINFO_USAGE_DIR_USE] = files;
180 debug_struct_ordinary[DINFO_USAGE_IND_USE] = files;
184 debug_struct_generic[DINFO_USAGE_DFN] = files;
185 debug_struct_generic[DINFO_USAGE_DIR_USE] = files;
186 debug_struct_generic[DINFO_USAGE_IND_USE] = files;
192 debug_struct_ordinary[usage] = files;
194 debug_struct_generic[usage] = files;
198 set_struct_debug_option (spec+1);
201 /* No more -femit-struct-debug-detailed specifications.
204 error ("argument %qs to %<-femit-struct-debug-detailed%> unknown",
206 if (debug_struct_ordinary[DINFO_USAGE_DIR_USE]
207 < debug_struct_ordinary[DINFO_USAGE_IND_USE]
208 || debug_struct_generic[DINFO_USAGE_DIR_USE]
209 < debug_struct_generic[DINFO_USAGE_IND_USE])
210 error ("%<-femit-struct-debug-detailed=dir:...%> must allow at least"
211 " as much as %<-femit-struct-debug-detailed=ind:...%>");
215 /* Find the base name of a path, stripping off both directories and
216 a single final extension. */
218 base_of_path (const char *path, const char **base_out)
220 const char *base = path;
222 const char *p = path;
226 if (IS_DIR_SEPARATOR(c))
241 /* Match the base name of a file to the base name of a compilation unit. */
243 static const char *main_input_basename;
244 static int main_input_baselength;
247 matches_main_base (const char *path)
249 /* Cache the last query. */
250 static const char *last_path = NULL;
251 static int last_match = 0;
252 if (path != last_path)
255 int length = base_of_path (path, &base);
257 last_match = (length == main_input_baselength
258 && memcmp (base, main_input_basename, length) == 0);
263 #ifdef DEBUG_DEBUG_STRUCT
266 dump_struct_debug (tree type, enum debug_info_usage usage,
267 enum debug_struct_file criterion, int generic,
268 int matches, int result)
270 /* Find the type name. */
271 tree type_decl = TYPE_STUB_DECL (type);
273 const char *name = 0;
274 if (TREE_CODE (t) == TYPE_DECL)
277 name = IDENTIFIER_POINTER (t);
279 fprintf (stderr, " struct %d %s %s %s %s %d %p %s\n",
281 DECL_IN_SYSTEM_HEADER (type_decl) ? "sys" : "usr",
282 matches ? "bas" : "hdr",
283 generic ? "gen" : "ord",
284 usage == DINFO_USAGE_DFN ? ";" :
285 usage == DINFO_USAGE_DIR_USE ? "." : "*",
287 (void*) type_decl, name);
290 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
291 dump_struct_debug (type, usage, criterion, generic, matches, result)
295 #define DUMP_GSTRUCT(type, usage, criterion, generic, matches, result) \
302 should_emit_struct_debug (tree type, enum debug_info_usage usage)
304 enum debug_struct_file criterion;
306 bool generic = lang_hooks.types.generic_p (type);
309 criterion = debug_struct_generic[usage];
311 criterion = debug_struct_ordinary[usage];
313 if (criterion == DINFO_STRUCT_FILE_NONE)
314 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
315 if (criterion == DINFO_STRUCT_FILE_ANY)
316 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
318 type_decl = TYPE_STUB_DECL (type);
320 if (criterion == DINFO_STRUCT_FILE_SYS && DECL_IN_SYSTEM_HEADER (type_decl))
321 return DUMP_GSTRUCT (type, usage, criterion, generic, false, true);
323 if (matches_main_base (DECL_SOURCE_FILE (type_decl)))
324 return DUMP_GSTRUCT (type, usage, criterion, generic, true, true);
325 return DUMP_GSTRUCT (type, usage, criterion, generic, false, false);
328 /* Nonzero means use GNU-only extensions in the generated symbolic
329 debugging information. Currently, this only has an effect when
330 write_symbols is set to DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
331 bool use_gnu_debug_info_extensions;
333 /* The default visibility for all symbols (unless overridden) */
334 enum symbol_visibility default_visibility = VISIBILITY_DEFAULT;
336 /* Disable unit-at-a-time for frontends that might be still broken in this
339 bool no_unit_at_a_time_default;
341 /* Global visibility options. */
342 struct visibility_flags visibility_options;
344 /* What to print when a switch has no documentation. */
345 #ifdef ENABLE_CHECKING
346 static const char undocumented_msg[] = N_("This switch lacks documentation");
348 static const char undocumented_msg[] = "";
351 /* Used for bookkeeping on whether user set these flags so
352 -fprofile-use/-fprofile-generate does not use them. */
353 static bool profile_arc_flag_set, flag_profile_values_set;
354 static bool flag_unroll_loops_set, flag_tracer_set;
355 static bool flag_value_profile_transformations_set;
356 static bool flag_peel_loops_set, flag_branch_probabilities_set;
357 static bool flag_inline_functions_set;
359 /* Functions excluded from profiling. */
361 typedef char *char_p; /* For DEF_VEC_P. */
363 DEF_VEC_ALLOC_P(char_p,heap);
365 static VEC(char_p,heap) *flag_instrument_functions_exclude_functions;
366 static VEC(char_p,heap) *flag_instrument_functions_exclude_files;
368 /* Input file names. */
369 const char **in_fnames;
370 unsigned num_in_fnames;
372 static int common_handle_option (size_t scode, const char *arg, int value,
373 unsigned int lang_mask);
374 static void handle_param (const char *);
375 static void set_Wextra (int);
376 static unsigned int handle_option (const char **argv, unsigned int lang_mask);
377 static char *write_langs (unsigned int lang_mask);
378 static void complain_wrong_lang (const char *, const struct cl_option *,
379 unsigned int lang_mask);
380 static void handle_options (unsigned int, const char **, unsigned int);
381 static void set_debug_level (enum debug_info_type type, int extended,
384 /* If ARG is a non-negative integer made up solely of digits, return its
385 value, otherwise return -1. */
387 integral_argument (const char *arg)
391 while (*p && ISDIGIT (*p))
400 /* Return a malloced slash-separated list of languages in MASK. */
402 write_langs (unsigned int mask)
404 unsigned int n = 0, len = 0;
405 const char *lang_name;
408 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
409 if (mask & (1U << n))
410 len += strlen (lang_name) + 1;
412 result = XNEWVEC (char, len);
414 for (n = 0; (lang_name = lang_names[n]) != 0; n++)
415 if (mask & (1U << n))
419 strcpy (result + len, lang_name);
420 len += strlen (lang_name);
428 /* Complain that switch OPT_INDEX does not apply to this front end. */
430 complain_wrong_lang (const char *text, const struct cl_option *option,
431 unsigned int lang_mask)
433 char *ok_langs, *bad_lang;
435 ok_langs = write_langs (option->flags);
436 bad_lang = write_langs (lang_mask);
438 /* Eventually this should become a hard error IMO. */
439 warning (0, "command line option \"%s\" is valid for %s but not for %s",
440 text, ok_langs, bad_lang);
446 /* Handle the switch beginning at ARGV for the language indicated by
447 LANG_MASK. Returns the number of switches consumed. */
449 handle_option (const char **argv, unsigned int lang_mask)
452 const char *opt, *arg = 0;
455 unsigned int result = 0;
456 const struct cl_option *option;
460 opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
461 if (opt_index == cl_options_count
462 && (opt[1] == 'W' || opt[1] == 'f' || opt[1] == 'm')
463 && opt[2] == 'n' && opt[3] == 'o' && opt[4] == '-')
465 /* Drop the "no-" from negative switches. */
466 size_t len = strlen (opt) - 3;
468 dup = XNEWVEC (char, len + 1);
471 memcpy (dup + 2, opt + 5, len - 2 + 1);
474 opt_index = find_opt (opt + 1, lang_mask | CL_COMMON | CL_TARGET);
477 if (opt_index == cl_options_count)
480 option = &cl_options[opt_index];
482 /* Reject negative form of switches that don't take negatives as
484 if (!value && (option->flags & CL_REJECT_NEGATIVE))
487 /* We've recognized this switch. */
490 /* Check to see if the option is disabled for this configuration. */
491 if (option->flags & CL_DISABLED)
493 error ("command line option %qs"
494 " is not supported by this configuration", opt);
498 /* Sort out any argument the switch takes. */
499 if (option->flags & CL_JOINED)
501 /* Have arg point to the original switch. This is because
502 some code, such as disable_builtin_function, expects its
503 argument to be persistent until the program exits. */
504 arg = argv[0] + cl_options[opt_index].opt_len + 1;
506 arg += strlen ("no-");
508 if (*arg == '\0' && !(option->flags & CL_MISSING_OK))
510 if (option->flags & CL_SEPARATE)
516 /* Missing argument. */
520 else if (option->flags & CL_SEPARATE)
526 /* Now we've swallowed any potential argument, complain if this
527 is a switch for a different front end. */
528 if (!(option->flags & (lang_mask | CL_COMMON | CL_TARGET)))
530 complain_wrong_lang (argv[0], option, lang_mask);
533 else if ((option->flags & CL_TARGET)
534 && (option->flags & CL_LANG_ALL)
535 && !(option->flags & lang_mask))
537 /* Complain for target flag language mismatches if any languages
539 complain_wrong_lang (argv[0], option, lang_mask);
543 if (arg == NULL && (option->flags & (CL_JOINED | CL_SEPARATE)))
545 if (!lang_hooks.missing_argument (opt, opt_index))
546 error ("missing argument to \"%s\"", opt);
550 /* If the switch takes an integer, convert it. */
551 if (arg && (option->flags & CL_UINTEGER))
553 value = integral_argument (arg);
556 error ("argument to \"%s\" should be a non-negative integer",
562 if (option->flag_var)
563 switch (option->var_type)
566 *(int *) option->flag_var = value;
570 *(int *) option->flag_var = (value
572 : !option->var_value);
577 if ((value != 0) == (option->var_type == CLVC_BIT_SET))
578 *(int *) option->flag_var |= option->var_value;
580 *(int *) option->flag_var &= ~option->var_value;
581 if (option->flag_var == &target_flags)
582 target_flags_explicit |= option->var_value;
586 *(const char **) option->flag_var = arg;
590 if (option->flags & lang_mask)
591 if (lang_hooks.handle_option (opt_index, arg, value) == 0)
594 if (result && (option->flags & CL_COMMON))
595 if (common_handle_option (opt_index, arg, value, lang_mask) == 0)
598 if (result && (option->flags & CL_TARGET))
599 if (!targetm.handle_option (opt_index, arg, value))
608 /* Handle FILENAME from the command line. */
610 add_input_filename (const char *filename)
613 in_fnames = xrealloc (in_fnames, num_in_fnames * sizeof (in_fnames[0]));
614 in_fnames[num_in_fnames - 1] = filename;
617 /* Add functions or file names to a vector of names to exclude from
621 add_instrument_functions_exclude_list (VEC(char_p,heap) **pvec,
629 /* We never free this string. */
642 VEC_safe_push (char_p, heap, *pvec, token_start);
645 if (*r == '\\' && r[1] == ',')
653 if (*token_start != '\0')
654 VEC_safe_push (char_p, heap, *pvec, token_start);
657 /* Return whether we should exclude FNDECL from instrumentation. */
660 flag_instrument_functions_exclude_p (tree fndecl)
662 if (VEC_length (char_p, flag_instrument_functions_exclude_functions) > 0)
668 name = lang_hooks.decl_printable_name (fndecl, 0);
670 VEC_iterate (char_p, flag_instrument_functions_exclude_functions,
674 if (strstr (name, s) != NULL)
679 if (VEC_length (char_p, flag_instrument_functions_exclude_files) > 0)
685 name = DECL_SOURCE_FILE (fndecl);
687 VEC_iterate (char_p, flag_instrument_functions_exclude_files, i, s);
690 if (strstr (name, s) != NULL)
698 /* Decode and handle the vector of command line options. LANG_MASK
699 contains has a single bit set representing the current
702 handle_options (unsigned int argc, const char **argv, unsigned int lang_mask)
706 for (i = 1; i < argc; i += n)
708 const char *opt = argv[i];
710 /* Interpret "-" or a non-switch as a file name. */
711 if (opt[0] != '-' || opt[1] == '\0')
713 if (main_input_filename == NULL)
715 main_input_filename = opt;
716 main_input_baselength
717 = base_of_path (main_input_filename, &main_input_basename);
719 add_input_filename (opt);
724 n = handle_option (argv + i, lang_mask);
729 error ("unrecognized command line option \"%s\"", opt);
734 /* Parse command line options and set default flag values. Do minimal
735 options processing. */
737 decode_options (unsigned int argc, const char **argv)
739 unsigned int i, lang_mask;
741 /* Perform language-specific options initialization. */
742 lang_mask = lang_hooks.init_options (argc, argv);
744 lang_hooks.initialize_diagnostics (global_dc);
746 /* Scan to see what optimization level has been specified. That will
747 determine the default value of many flags. */
748 for (i = 1; i < argc; i++)
750 if (!strcmp (argv[i], "-O"))
755 else if (argv[i][0] == '-' && argv[i][1] == 'O')
757 /* Handle -Os, -O2, -O3, -O69, ... */
758 const char *p = &argv[i][2];
760 if ((p[0] == 's') && (p[1] == 0))
764 /* Optimizing for size forces optimize to be 2. */
769 const int optimize_val = read_integral_parameter (p, p - 2, -1);
770 if (optimize_val != -1)
772 optimize = optimize_val;
781 flag_merge_constants = 0;
788 flag_delayed_branch = 1;
790 #ifdef CAN_DEBUG_WITHOUT_FP
791 flag_omit_frame_pointer = 1;
793 flag_guess_branch_prob = 1;
794 flag_cprop_registers = 1;
795 flag_if_conversion = 1;
796 flag_if_conversion2 = 1;
797 flag_ipa_pure_const = 1;
798 flag_ipa_reference = 1;
799 flag_split_wide_types = 1;
806 flag_tree_copyrename = 1;
808 flag_tree_copy_prop = 1;
810 flag_tree_salias = 1;
811 if (!no_unit_at_a_time_default)
812 flag_unit_at_a_time = 1;
816 /* Loop header copying usually increases size of the code. This used
817 not to be true, since quite often it is possible to verify that
818 the condition is satisfied in the first iteration and therefore
819 to eliminate it. Jump threading handles these cases now. */
826 flag_inline_small_functions = 1;
827 flag_thread_jumps = 1;
828 flag_crossjumping = 1;
829 flag_optimize_sibling_calls = 1;
830 flag_forward_propagate = 1;
831 flag_cse_follow_jumps = 1;
833 flag_expensive_optimizations = 1;
834 flag_rerun_cse_after_loop = 1;
835 flag_caller_saves = 1;
837 #ifdef INSN_SCHEDULING
838 flag_schedule_insns = 1;
839 flag_schedule_insns_after_reload = 1;
842 flag_strict_aliasing = 1;
843 flag_strict_overflow = 1;
844 flag_delete_null_pointer_checks = 1;
845 flag_reorder_blocks = 1;
846 flag_reorder_functions = 1;
847 flag_tree_store_ccp = 1;
852 /* PRE tends to generate bigger code. */
856 /* Allow more virtual operators to increase alias precision. */
857 set_param_value ("max-aliased-vops", 500);
862 flag_predictive_commoning = 1;
863 flag_inline_functions = 1;
864 flag_unswitch_loops = 1;
865 flag_gcse_after_reload = 1;
866 flag_tree_vectorize = 1;
868 /* Allow even more virtual operators. */
869 set_param_value ("max-aliased-vops", 1000);
870 set_param_value ("avg-aliased-vops", 3);
873 if (optimize < 2 || optimize_size)
880 /* Don't reorder blocks when optimizing for size because extra
881 jump insns may be created; also barrier may create extra padding.
883 More correctly we should have a block reordering mode that tried
884 to minimize the combined size of all the jumps. This would more
885 or less automatically remove extra jumps, but would also try to
886 use more short jumps instead of long jumps. */
887 flag_reorder_blocks = 0;
888 flag_reorder_blocks_and_partition = 0;
893 /* Inlining of functions reducing size is a good idea regardless
894 of them being declared inline. */
895 flag_inline_functions = 1;
897 /* We want to crossjump as much as possible. */
898 set_param_value ("min-crossjump-insns", 1);
901 /* Initialize whether `char' is signed. */
902 flag_signed_char = DEFAULT_SIGNED_CHAR;
903 /* Set this to a special "uninitialized" value. The actual default is set
904 after target options have been processed. */
905 flag_short_enums = 2;
907 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
909 target_flags = targetm.default_target_flags;
911 /* Some tagets have ABI-specified unwind tables. */
912 flag_unwind_tables = targetm.unwind_tables_default;
914 #ifdef OPTIMIZATION_OPTIONS
915 /* Allow default optimizations to be specified on a per-machine basis. */
916 OPTIMIZATION_OPTIONS (optimize, optimize_size);
919 handle_options (argc, argv, lang_mask);
923 if (flag_pic && !flag_pie)
926 if (flag_no_inline == 2)
929 flag_really_no_inline = flag_no_inline;
931 /* Set flag_no_inline before the post_options () hook. The C front
932 ends use it to determine tree inlining defaults. FIXME: such
933 code should be lang-independent when all front ends use tree
934 inlining, in which case it, and this condition, should be moved
935 to the top of process_options() instead. */
938 /* Inlining does not work if not optimizing,
939 so force it not to be done. */
943 /* The c_decode_option function and decode_option hook set
944 this to `2' if -Wall is used, so we can avoid giving out
945 lots of errors for people who don't realize what -Wall does. */
946 if (warn_uninitialized == 1)
947 warning (OPT_Wuninitialized,
948 "-Wuninitialized is not supported without -O");
951 if (flag_really_no_inline == 2)
952 flag_really_no_inline = flag_no_inline;
954 /* Inlining of functions called just once will only work if we can look
955 at the complete translation unit. */
956 if (flag_inline_functions_called_once && !flag_unit_at_a_time)
958 flag_inline_functions_called_once = 0;
959 warning (OPT_Wdisabled_optimization,
960 "-funit-at-a-time is required for inlining of functions "
961 "that are only called once");
964 /* The optimization to partition hot and cold basic blocks into separate
965 sections of the .o and executable files does not work (currently)
966 with exception handling. This is because there is no support for
967 generating unwind info. If flag_exceptions is turned on we need to
968 turn off the partitioning optimization. */
970 if (flag_exceptions && flag_reorder_blocks_and_partition)
973 ("-freorder-blocks-and-partition does not work with exceptions");
974 flag_reorder_blocks_and_partition = 0;
975 flag_reorder_blocks = 1;
978 /* If user requested unwind info, then turn off the partitioning
981 if (flag_unwind_tables && ! targetm.unwind_tables_default
982 && flag_reorder_blocks_and_partition)
984 inform ("-freorder-blocks-and-partition does not support unwind info");
985 flag_reorder_blocks_and_partition = 0;
986 flag_reorder_blocks = 1;
989 /* If the target requested unwind info, then turn off the partitioning
990 optimization with a different message. Likewise, if the target does not
991 support named sections. */
993 if (flag_reorder_blocks_and_partition
994 && (!targetm.have_named_sections
995 || (flag_unwind_tables && targetm.unwind_tables_default)))
998 ("-freorder-blocks-and-partition does not work on this architecture");
999 flag_reorder_blocks_and_partition = 0;
1000 flag_reorder_blocks = 1;
1004 #define LEFT_COLUMN 27
1006 /* Output ITEM, of length ITEM_WIDTH, in the left column,
1007 followed by word-wrapped HELP in a second column. */
1009 wrap_help (const char *help,
1011 unsigned int item_width,
1012 unsigned int columns)
1014 unsigned int col_width = LEFT_COLUMN;
1015 unsigned int remaining, room, len;
1017 remaining = strlen (help);
1021 room = columns - 3 - MAX (col_width, item_width);
1030 for (i = 0; help[i]; i++)
1032 if (i >= room && len != remaining)
1036 else if ((help[i] == '-' || help[i] == '/')
1037 && help[i + 1] != ' '
1038 && i > 0 && ISALPHA (help[i - 1]))
1043 printf( " %-*.*s %.*s\n", col_width, item_width, item, len, help);
1045 while (help[len] == ' ')
1053 /* Print help for a specific front-end, etc. */
1055 print_filtered_help (unsigned int include_flags,
1056 unsigned int exclude_flags,
1057 unsigned int any_flags,
1058 unsigned int columns)
1062 static char *printed = NULL;
1064 bool displayed = false;
1066 if (include_flags == CL_PARAMS)
1068 for (i = 0; i < LAST_PARAM; i++)
1070 const char *param = compiler_params[i].option;
1072 help = compiler_params[i].help;
1073 if (help == NULL || *help == '\0')
1075 if (exclude_flags & CL_UNDOCUMENTED)
1077 help = undocumented_msg;
1080 /* Get the translation. */
1083 wrap_help (help, param, strlen (param), columns);
1090 printed = xcalloc (1, cl_options_count);
1092 for (i = 0; i < cl_options_count; i++)
1094 static char new_help[128];
1095 const struct cl_option *option = cl_options + i;
1100 if (include_flags == 0
1101 || ((option->flags & include_flags) != include_flags))
1103 if ((option->flags & any_flags) == 0)
1107 /* Skip unwanted switches. */
1108 if ((option->flags & exclude_flags) != 0)
1112 /* Skip switches that have already been printed. */
1118 help = option->help;
1121 if (exclude_flags & CL_UNDOCUMENTED)
1123 help = undocumented_msg;
1126 /* Get the translation. */
1129 /* Find the gap between the name of the
1130 option and its descriptive text. */
1131 tab = strchr (help, '\t');
1140 opt = option->opt_text;
1144 /* With the -Q option enabled we change the descriptive text associated
1145 with an option to be an indication of its current setting. */
1148 if (len < (LEFT_COLUMN + 2))
1149 strcpy (new_help, "\t\t");
1151 strcpy (new_help, "\t");
1153 if (option->flag_var != NULL)
1155 if (option->flags & CL_JOINED)
1157 if (option->var_type == CLVC_STRING)
1159 if (* (const char **) option->flag_var != NULL)
1160 snprintf (new_help + strlen (new_help),
1161 sizeof (new_help) - strlen (new_help),
1162 * (const char **) option->flag_var);
1165 sprintf (new_help + strlen (new_help),
1166 "%#x", * (int *) option->flag_var);
1169 strcat (new_help, option_enabled (i)
1170 ? _("[enabled]") : _("[disabled]"));
1176 wrap_help (help, opt, len, columns);
1182 unsigned int langs = include_flags & CL_LANG_ALL;
1185 printf (_(" No options with the desired characteristics were found\n"));
1190 /* PR 31349: Tell the user how to see all of the
1191 options supported by a specific front end. */
1192 for (i = 0; (1U << i) < CL_LANG_ALL; i ++)
1193 if ((1U << i) & langs)
1194 printf (_(" None found. Use --help=%s to show *all* the options supported by the %s front-end\n"),
1195 lang_names[i], lang_names[i]);
1199 else if (! displayed)
1200 printf (_(" All options with the desired characteristics have already been displayed\n"));
1205 /* Display help for a specified type of option.
1206 The options must have ALL of the INCLUDE_FLAGS set
1207 ANY of the flags in the ANY_FLAGS set
1208 and NONE of the EXCLUDE_FLAGS set. */
1210 print_specific_help (unsigned int include_flags,
1211 unsigned int exclude_flags,
1212 unsigned int any_flags)
1214 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1215 const char * description = NULL;
1216 const char * descrip_extra = "";
1219 static unsigned int columns = 0;
1221 /* Sanity check: Make sure that we do not have more
1222 languages than we have bits available to enumerate them. */
1223 gcc_assert ((1U << cl_lang_count) < CL_MIN_OPTION_CLASS);
1225 /* If we have not done so already, obtain
1226 the desired maximum width of the output. */
1231 GET_ENVIRONMENT (p, "COLUMNS");
1234 int value = atoi (p);
1241 /* Use a reasonable default. */
1245 /* Decide upon the title for the options that we are going to display. */
1246 for (i = 0, flag = 1; flag <= CL_MAX_OPTION_CLASS; flag <<= 1, i ++)
1248 switch (flag & include_flags)
1254 description = _("The following options are target specific");
1257 description = _("The following options control compiler warning messages");
1259 case CL_OPTIMIZATION:
1260 description = _("The following options control optimizations");
1263 description = _("The following options are language-independent");
1266 description = _("The --param option recognizes the following as parameters");
1269 if (i >= cl_lang_count)
1271 if ((exclude_flags & ((1U << cl_lang_count) - 1)) != 0)
1272 description = _("The following options are specific to just the language ");
1274 description = _("The following options are supported by the language ");
1275 descrip_extra = lang_names [i];
1280 if (description == NULL)
1284 if (include_flags == CL_UNDOCUMENTED)
1285 description = _("The following options are not documented");
1288 internal_error ("unrecognized include_flags 0x%x passed to print_specific_help",
1295 if (any_flags & all_langs_mask)
1296 description = _("The following options are language-related");
1298 description = _("The following options are language-independent");
1302 printf ("%s%s:\n", description, descrip_extra);
1303 print_filtered_help (include_flags, exclude_flags, any_flags, columns);
1306 /* Handle target- and language-independent options. Return zero to
1307 generate an "unknown option" message. Only options that need
1308 extra handling need to be listed here; if you simply want
1309 VALUE assigned to a variable, it happens automatically. */
1312 common_handle_option (size_t scode, const char *arg, int value,
1313 unsigned int lang_mask)
1315 static bool verbose = false;
1316 enum opt_code code = (enum opt_code) scode;
1331 unsigned int all_langs_mask = (1U << cl_lang_count) - 1;
1332 unsigned int undoc_mask;
1335 undoc_mask = (verbose | extra_warnings) ? 0 : CL_UNDOCUMENTED;
1336 /* First display any single language specific options. */
1337 for (i = 0; i < cl_lang_count; i++)
1339 (1U << i, (all_langs_mask & (~ (1U << i))) | undoc_mask, 0);
1340 /* Next display any multi language specific options. */
1341 print_specific_help (0, undoc_mask, all_langs_mask);
1342 /* Then display any remaining, non-language options. */
1343 for (i = CL_MIN_OPTION_CLASS; i <= CL_MAX_OPTION_CLASS; i <<= 1)
1344 print_specific_help (i, undoc_mask, 0);
1345 exit_after_options = true;
1349 case OPT_ftarget_help:
1350 case OPT__target_help:
1351 print_specific_help (CL_TARGET, CL_UNDOCUMENTED, 0);
1352 exit_after_options = true;
1354 /* Allow the target a chance to give the user some additional information. */
1355 if (targetm.target_help)
1356 targetm.target_help ();
1362 const char * a = arg;
1363 unsigned int include_flags = 0;
1364 /* Note - by default we include undocumented options when listing
1365 specific classes. If you only want to see documented options
1366 then add ",^undocumented" to the --help= option. e.g.:
1368 --help=target,^undocumented */
1369 unsigned int exclude_flags = 0;
1371 /* Walk along the argument string, parsing each word in turn.
1373 arg = [^]{word}[,{arg}]
1374 word = {optimizers|target|warnings|undocumented|
1375 params|common|<language>} */
1380 const char * string;
1385 { "optimizers", CL_OPTIMIZATION },
1386 { "target", CL_TARGET },
1387 { "warnings", CL_WARNING },
1388 { "undocumented", CL_UNDOCUMENTED },
1389 { "params", CL_PARAMS },
1390 { "joined", CL_JOINED },
1391 { "separate", CL_SEPARATE },
1392 { "common", CL_COMMON },
1395 unsigned int * pflags;
1397 unsigned int lang_flag, specific_flag;
1404 pflags = & exclude_flags;
1407 pflags = & include_flags;
1409 comma = strchr (a, ',');
1415 /* Check to see if the string matches an option class name. */
1416 for (i = 0, specific_flag = 0; specifics[i].string != NULL; i++)
1417 if (strncasecmp (a, specifics[i].string, len) == 0)
1419 specific_flag = specifics[i].flag;
1423 /* Check to see if the string matches a language name.
1424 Note - we rely upon the alpha-sorted nature of the entries in
1425 the lang_names array, specifically that shorter names appear
1426 before their longer variants. (ie C before C++). That way
1427 when we are attempting to match --help=c for example we will
1428 match with C first and not C++. */
1429 for (i = 0, lang_flag = 0; i < cl_lang_count; i++)
1430 if (strncasecmp (a, lang_names[i], len) == 0)
1432 lang_flag = 1U << i;
1436 if (specific_flag != 0)
1439 * pflags |= specific_flag;
1442 /* The option's argument matches both the start of a
1443 language name and the start of an option class name.
1444 We have a special case for when the user has
1445 specified "--help=c", but otherwise we have to issue
1447 if (strncasecmp (a, "c", len) == 0)
1448 * pflags |= lang_flag;
1451 "warning: --help argument %.*s is ambiguous, please be more specific\n",
1455 else if (lang_flag != 0)
1456 * pflags |= lang_flag;
1459 "warning: unrecognized argument to --help= option: %.*s\n",
1468 print_specific_help (include_flags, exclude_flags, 0);
1469 exit_after_options = true;
1474 print_version (stderr, "");
1475 exit_after_options = true;
1479 g_switch_value = value;
1480 g_switch_set = true;
1485 /* Currently handled in a prescan. */
1489 /* For backward compatibility, -W is the same as -Wextra. */
1494 enable_warning_as_error (arg, value, lang_mask);
1501 case OPT_Wlarger_than_:
1502 larger_than_size = value;
1503 warn_larger_than = value != -1;
1506 case OPT_Wframe_larger_than_:
1507 frame_larger_than_size = value;
1508 warn_frame_larger_than = value != -1;
1511 case OPT_Wstrict_aliasing:
1512 set_Wstrict_aliasing (value);
1515 case OPT_Wstrict_aliasing_:
1516 warn_strict_aliasing = value;
1519 case OPT_Wstrict_overflow:
1520 warn_strict_overflow = (value
1521 ? (int) WARN_STRICT_OVERFLOW_CONDITIONAL
1525 case OPT_Wstrict_overflow_:
1526 warn_strict_overflow = value;
1530 set_Wunused (value);
1535 aux_info_file_name = arg;
1536 flag_gen_aux_info = 1;
1540 aux_base_name = arg;
1543 case OPT_auxbase_strip:
1545 char *tmp = xstrdup (arg);
1546 strip_off_ending (tmp, strlen (tmp));
1548 aux_base_name = tmp;
1553 decode_d_option (arg);
1557 dump_base_name = arg;
1560 case OPT_falign_functions_:
1561 align_functions = value;
1564 case OPT_falign_jumps_:
1565 align_jumps = value;
1568 case OPT_falign_labels_:
1569 align_labels = value;
1572 case OPT_falign_loops_:
1573 align_loops = value;
1576 case OPT_fbranch_probabilities:
1577 flag_branch_probabilities_set = true;
1580 case OPT_fcall_used_:
1581 fix_register (arg, 0, 1);
1584 case OPT_fcall_saved_:
1585 fix_register (arg, 0, 0);
1589 dbg_cnt_process_opt (arg);
1592 case OPT_fdbg_cnt_list:
1593 dbg_cnt_list_all_counters ();
1596 case OPT_fdebug_prefix_map_:
1597 add_debug_prefix_map (arg);
1600 case OPT_fdiagnostics_show_location_:
1601 if (!strcmp (arg, "once"))
1602 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
1603 else if (!strcmp (arg, "every-line"))
1604 diagnostic_prefixing_rule (global_dc)
1605 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
1610 case OPT_fdiagnostics_show_option:
1611 global_dc->show_option_requested = true;
1615 if (!dump_switch_p (arg))
1619 case OPT_ffast_math:
1620 set_fast_math_flags (value);
1623 case OPT_funsafe_math_optimizations:
1624 set_unsafe_math_optimizations_flags (value);
1628 fix_register (arg, 1, 1);
1631 case OPT_finline_limit_:
1632 case OPT_finline_limit_eq:
1633 set_param_value ("max-inline-insns-single", value / 2);
1634 set_param_value ("max-inline-insns-auto", value / 2);
1637 case OPT_finstrument_functions_exclude_function_list_:
1638 add_instrument_functions_exclude_list
1639 (&flag_instrument_functions_exclude_functions, arg);
1642 case OPT_finstrument_functions_exclude_file_list_:
1643 add_instrument_functions_exclude_list
1644 (&flag_instrument_functions_exclude_files, arg);
1647 case OPT_fmessage_length_:
1648 pp_set_line_maximum_length (global_dc->printer, value);
1651 case OPT_fpack_struct_:
1652 if (value <= 0 || (value & (value - 1)) || value > 16)
1653 error ("structure alignment must be a small power of two, not %d", value);
1656 initial_max_fld_align = value;
1657 maximum_field_alignment = value * BITS_PER_UNIT;
1661 case OPT_fpeel_loops:
1662 flag_peel_loops_set = true;
1665 case OPT_fprofile_arcs:
1666 profile_arc_flag_set = true;
1669 case OPT_finline_functions:
1670 flag_inline_functions_set = true;
1673 case OPT_fprofile_use:
1674 if (!flag_branch_probabilities_set)
1675 flag_branch_probabilities = value;
1676 if (!flag_profile_values_set)
1677 flag_profile_values = value;
1678 if (!flag_unroll_loops_set)
1679 flag_unroll_loops = value;
1680 if (!flag_peel_loops_set)
1681 flag_peel_loops = value;
1682 if (!flag_tracer_set)
1683 flag_tracer = value;
1684 if (!flag_value_profile_transformations_set)
1685 flag_value_profile_transformations = value;
1686 if (!flag_inline_functions_set)
1687 flag_inline_functions = value;
1690 case OPT_fprofile_generate:
1691 if (!profile_arc_flag_set)
1692 profile_arc_flag = value;
1693 if (!flag_profile_values_set)
1694 flag_profile_values = value;
1695 if (!flag_value_profile_transformations_set)
1696 flag_value_profile_transformations = value;
1697 if (!flag_inline_functions_set)
1698 flag_inline_functions = value;
1701 case OPT_fprofile_values:
1702 flag_profile_values_set = true;
1705 case OPT_fvisibility_:
1707 if (!strcmp(arg, "default"))
1708 default_visibility = VISIBILITY_DEFAULT;
1709 else if (!strcmp(arg, "internal"))
1710 default_visibility = VISIBILITY_INTERNAL;
1711 else if (!strcmp(arg, "hidden"))
1712 default_visibility = VISIBILITY_HIDDEN;
1713 else if (!strcmp(arg, "protected"))
1714 default_visibility = VISIBILITY_PROTECTED;
1716 error ("unrecognized visibility value \"%s\"", arg);
1721 flag_value_profile_transformations_set = true;
1724 case OPT_frandom_seed:
1725 /* The real switch is -fno-random-seed. */
1728 set_random_seed (NULL);
1731 case OPT_frandom_seed_:
1732 set_random_seed (arg);
1735 case OPT_fsched_verbose_:
1736 #ifdef INSN_SCHEDULING
1737 fix_sched_param ("verbose", arg);
1743 case OPT_fsched_stalled_insns_:
1744 flag_sched_stalled_insns = value;
1745 if (flag_sched_stalled_insns == 0)
1746 flag_sched_stalled_insns = -1;
1749 case OPT_fsched_stalled_insns_dep_:
1750 flag_sched_stalled_insns_dep = value;
1753 case OPT_fstack_limit:
1754 /* The real switch is -fno-stack-limit. */
1757 stack_limit_rtx = NULL_RTX;
1760 case OPT_fstack_limit_register_:
1762 int reg = decode_reg_name (arg);
1764 error ("unrecognized register name \"%s\"", arg);
1766 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
1770 case OPT_fstack_limit_symbol_:
1771 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (arg));
1774 case OPT_ftree_vectorizer_verbose_:
1775 vect_set_verbosity_level (arg);
1778 case OPT_ftls_model_:
1779 if (!strcmp (arg, "global-dynamic"))
1780 flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
1781 else if (!strcmp (arg, "local-dynamic"))
1782 flag_tls_default = TLS_MODEL_LOCAL_DYNAMIC;
1783 else if (!strcmp (arg, "initial-exec"))
1784 flag_tls_default = TLS_MODEL_INITIAL_EXEC;
1785 else if (!strcmp (arg, "local-exec"))
1786 flag_tls_default = TLS_MODEL_LOCAL_EXEC;
1788 warning (0, "unknown tls-model \"%s\"", arg);
1792 flag_tracer_set = true;
1795 case OPT_funroll_loops:
1796 flag_unroll_loops_set = true;
1800 set_debug_level (NO_DEBUG, DEFAULT_GDB_EXTENSIONS, arg);
1804 set_debug_level (SDB_DEBUG, false, arg);
1808 set_debug_level (DWARF2_DEBUG, false, arg);
1812 set_debug_level (NO_DEBUG, 2, arg);
1817 set_debug_level (DBX_DEBUG, code == OPT_gstabs_, arg);
1821 set_debug_level (VMS_DEBUG, false, arg);
1826 set_debug_level (XCOFF_DEBUG, code == OPT_gxcoff_, arg);
1830 asm_file_name = arg;
1833 case OPT_pedantic_errors:
1834 flag_pedantic_errors = pedantic = 1;
1837 case OPT_floop_optimize:
1838 case OPT_frerun_loop_opt:
1839 case OPT_fstrength_reduce:
1840 case OPT_ftree_store_copy_prop:
1841 case OPT_fforce_addr:
1842 /* These are no-ops, preserved for backward compatibility. */
1846 /* If the flag was handled in a standard way, assume the lack of
1847 processing here is intentional. */
1848 gcc_assert (cl_options[scode].flag_var);
1855 /* Handle --param NAME=VALUE. */
1857 handle_param (const char *carg)
1862 arg = xstrdup (carg);
1863 equal = strchr (arg, '=');
1865 error ("%s: --param arguments should be of the form NAME=VALUE", arg);
1868 value = integral_argument (equal + 1);
1870 error ("invalid --param value %qs", equal + 1);
1874 set_param_value (arg, value);
1881 /* Handle -W and -Wextra. */
1883 set_Wextra (int setting)
1885 extra_warnings = setting;
1886 warn_unused_parameter = (setting && maybe_warn_unused_parameter);
1888 /* We save the value of warn_uninitialized, since if they put
1889 -Wuninitialized on the command line, we need to generate a
1890 warning about not using it without also specifying -O. */
1892 warn_uninitialized = 0;
1893 else if (warn_uninitialized != 1)
1894 warn_uninitialized = 2;
1897 /* Initialize unused warning flags. */
1899 set_Wunused (int setting)
1901 warn_unused_function = setting;
1902 warn_unused_label = setting;
1903 /* Unused function parameter warnings are reported when either
1904 ``-Wextra -Wunused'' or ``-Wunused-parameter'' is specified.
1905 Thus, if -Wextra has already been seen, set warn_unused_parameter;
1906 otherwise set maybe_warn_extra_parameter, which will be picked up
1908 maybe_warn_unused_parameter = setting;
1909 warn_unused_parameter = (setting && extra_warnings);
1910 warn_unused_variable = setting;
1911 warn_unused_value = setting;
1914 /* Used to set the level of strict aliasing warnings,
1915 when no level is specified (i.e., when -Wstrict-aliasing, and not
1916 -Wstrict-aliasing=level was given).
1917 ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
1918 and 0 otherwise. After calling this function, wstrict_aliasing will be
1919 set to the default value of -Wstrict_aliasing=level, currently 3. */
1921 set_Wstrict_aliasing (int onoff)
1923 gcc_assert (onoff == 0 || onoff == 1);
1925 warn_strict_aliasing = 3;
1928 /* The following routines are useful in setting all the flags that
1929 -ffast-math and -fno-fast-math imply. */
1931 set_fast_math_flags (int set)
1933 flag_unsafe_math_optimizations = set;
1934 set_unsafe_math_optimizations_flags (set);
1935 flag_finite_math_only = set;
1936 flag_errno_math = !set;
1939 flag_signaling_nans = 0;
1940 flag_rounding_math = 0;
1941 flag_cx_limited_range = 1;
1945 /* When -funsafe-math-optimizations is set the following
1946 flags are set as well. */
1948 set_unsafe_math_optimizations_flags (int set)
1950 flag_trapping_math = !set;
1951 flag_signed_zeros = !set;
1952 flag_associative_math = set;
1953 flag_reciprocal_math = set;
1956 /* Return true iff flags are set as if -ffast-math. */
1958 fast_math_flags_set_p (void)
1960 return (!flag_trapping_math
1961 && flag_unsafe_math_optimizations
1962 && flag_finite_math_only
1963 && !flag_signed_zeros
1964 && !flag_errno_math);
1967 /* Handle a debug output -g switch. EXTENDED is true or false to support
1968 extended output (2 is special and means "-ggdb" was given). */
1970 set_debug_level (enum debug_info_type type, int extended, const char *arg)
1972 static bool type_explicit;
1974 use_gnu_debug_info_extensions = extended;
1976 if (type == NO_DEBUG)
1978 if (write_symbols == NO_DEBUG)
1980 write_symbols = PREFERRED_DEBUGGING_TYPE;
1984 #ifdef DWARF2_DEBUGGING_INFO
1985 write_symbols = DWARF2_DEBUG;
1986 #elif defined DBX_DEBUGGING_INFO
1987 write_symbols = DBX_DEBUG;
1991 if (write_symbols == NO_DEBUG)
1992 warning (0, "target system does not support debug output");
1997 /* Does it conflict with an already selected type? */
1998 if (type_explicit && write_symbols != NO_DEBUG && type != write_symbols)
1999 error ("debug format \"%s\" conflicts with prior selection",
2000 debug_type_names[type]);
2001 write_symbols = type;
2002 type_explicit = true;
2005 /* A debug flag without a level defaults to level 2. */
2008 if (!debug_info_level)
2009 debug_info_level = 2;
2013 debug_info_level = integral_argument (arg);
2014 if (debug_info_level == (unsigned int) -1)
2015 error ("unrecognised debug output level \"%s\"", arg);
2016 else if (debug_info_level > 3)
2017 error ("debug output level %s is too high", arg);
2021 /* Return 1 if OPTION is enabled, 0 if it is disabled, or -1 if it isn't
2022 a simple on-off switch. */
2025 option_enabled (int opt_idx)
2027 const struct cl_option *option = &(cl_options[opt_idx]);
2029 if (option->flag_var)
2030 switch (option->var_type)
2033 return *(int *) option->flag_var != 0;
2036 return *(int *) option->flag_var == option->var_value;
2038 case CLVC_BIT_CLEAR:
2039 return (*(int *) option->flag_var & option->var_value) == 0;
2042 return (*(int *) option->flag_var & option->var_value) != 0;
2050 /* Fill STATE with the current state of option OPTION. Return true if
2051 there is some state to store. */
2054 get_option_state (int option, struct cl_option_state *state)
2056 if (cl_options[option].flag_var == 0)
2059 switch (cl_options[option].var_type)
2063 state->data = cl_options[option].flag_var;
2064 state->size = sizeof (int);
2067 case CLVC_BIT_CLEAR:
2069 state->ch = option_enabled (option);
2070 state->data = &state->ch;
2075 state->data = *(const char **) cl_options[option].flag_var;
2076 if (state->data == 0)
2078 state->size = strlen (state->data) + 1;
2084 /* Enable a warning option as an error. This is used by -Werror= and
2085 also by legacy Werror-implicit-function-declaration. */
2088 enable_warning_as_error (const char *arg, int value, unsigned int lang_mask)
2093 new_option = XNEWVEC (char, strlen (arg) + 2);
2094 new_option[0] = 'W';
2095 strcpy (new_option + 1, arg);
2096 option_index = find_opt (new_option, lang_mask);
2097 if (option_index == N_OPTS)
2099 error ("-Werror=%s: No option -%s", arg, new_option);
2103 int kind = value ? DK_ERROR : DK_WARNING;
2104 diagnostic_classify_diagnostic (global_dc, option_index, kind);
2106 /* -Werror=foo implies -Wfoo. */
2107 if (cl_options[option_index].var_type == CLVC_BOOLEAN
2108 && cl_options[option_index].flag_var
2109 && kind == DK_ERROR)
2110 *(int *) cl_options[option_index].flag_var = 1;